peters



1 uitrit ets @ttt-lent4 @ffice G. W. coltEY, `or Po RT 'JE Rv1s,NEWY 0,R-K.

v 'Letters Patent .No.HQ, dated Julyl, 1867.A

IMPROVED Bernois.'

@he .Srtrtulr referat-tu, in thst .tetter ntet mit mating ,part nf the hun.

TO ALL WHOM I'l MAY'OONCERN I 4 Be itknown that I, G.'W. COREY, -Vof Port Jervis, lin the county of- Orange, andState of New York, lm ve invented a certain new and useful Improvement on Bridges; and I do hereby declare that the following is n full clear, and cita-ct description thereof, reference beihg had to theaccompanying drawings and tc the letters a-nd marks thereon, which said drawings form part of thisspeciiicntion, and bythe several figures thereofrepresciit ports and portionsi'ot' n bridge constructed with my improvement es-a p art tl'rereof.` The general construction f thebridge here represented does not dier materially' from bridges well known, thc improremcnt relating to points of special construction. i i

, By reference toFigure 1 cfthese drawings it'will be noticed that -the braces a, ypassing from thelstriug-peccs b endl cof the upper and lower chords, hnve their ends fitting into recesses in the string-pieces, so that the part d ofthe string-piece oneaoh side ofthe brace, asis indicated by Figure 2, ts into the nngulnrpointof union of the I. two braces,l Atithis'pont ot' uniorr'ot` the braces, ns also at the crossing pointfe, one-holfof enc-h brace is' cut out,-sothotjtjtlgese points the-thickness ofthetvwodis only equal to the one brgicc' at all other points than that where they'are united. This fitting in of thebrnces at thercrossing points is shown by the crossssectiomFigurc 3.

The braces thus united andv fitted into the recesses in. thestring-pieces ect'us ties es well as braces. Where the -ends ofthe braces vproject beyond the stringfnieces e shoe, shown seperately by Fgu re 4, having recesses for the I ende of the braces', is secured to thestring-piece. This shoe,f, therefre, uids in binding the braces :tud string` piecesrto 'each-other. A.tl certain points oi' the chords, and particularly at points where joints occur, as when.

the' stringpieces are tted to' cach other on the 'break-jointsysteur, keys g, fitting in recesses, are secured to the string-pieces, allso 'adding to the binding together of the pieces of timber-.composing thehrdge. vThe recesses for thebrces'in the'string-pieces are made one-halt` in cach string-piece, the chords consisting oftwo 4ormore string-pieces, end when it is desirable to use four or Drawstring-pieces f'or tbe chordftwovoinore sets of braces 'may -be used, andthey be so arrangedin relation to each other as to have' the points of union ofthe one set bel.

'in line' with the -spztce between thebrsces ofthe other set. Bridges constructed with my improvementnsa pa-rt con vhave the trocken 'the u-pper or-loyver chord, und can have the usuel cross-'timbers It, and tie-rods z', with v 'such systemot` Wedges, ttc., cs maybe preferred. The shoef: is designed to beV used inlinstances where the chord is of the thickness of one string-piece only, as whereulit is'ot` the thickness of two'stringpepes the ends Yof' the braces will be recessed in the lower string=-piece.

W'hat l' claim?, as my invention, and-desir-cto secure by Letters Patent, is..

Thebraces a, shoef, and keys g, ell constructed and nrrangdas described, nnd forrthe pdrposeset forth.

Witnesses:

JAMES M. PENNEY, Jncon Boomer. 

